This thread collects safety wiring notes for connecting external E-stop circuits, door interlocks and safety controllers to Fairino controllers.

Status

Known warning. Treat this as a safety-critical topic. Always validate wiring with the official manual, a qualified safety engineer and your local regulations.

Important warning

  • Do not assume that an OSSD safety output can be connected directly to every Fairino E-stop input.
  • Community reports indicate that the E-stop circuit may expect dry contacts or a suitable safety relay interface.
  • Incorrect wiring can damage outputs, controller electronics or create an unsafe machine state.

Known checks

  • Confirm whether the external device outputs dry contacts, PNP/NPN signals or OSSD pulses.
  • Check the Fairino safety input wiring diagram for your controller model.
  • Use a safety relay/interface module when required.
  • Test stop categories and reset behavior before production use.
  • Document which E-stop source is reported back to the upstream safety controller to avoid feedback loops.

Please reply with

  • Controller model
  • Safety device model
  • Signal type: dry contact, OSSD, PNP, NPN
  • Required behavior: local E-stop, external E-stop, safety curtain, door interlock